JP2009204035A - Tubular protection cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tubular protection cover 1a for easily and tightly covering a joint portion even in the state of covering a header with a cylindrical temperature retaining material. <P>SOLUTION: The tubular protection cover 1a for a connection pipe comprises a cylindrical joint cover part 11 formed at one end with its inner diameter to cover a joint to which the connection pipe is connected. The joint cover part 11 has a cut-off slit 11a formed in an approximate saddle shape along the front end wall face. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a tubular protective cover for a connecting pipe connected to a joint, and more particularly to a tubular protective cover used to cover an end of the connecting pipe connected to a joint provided on a header and a joint portion.

The header construction method that is popular in apartment buildings such as condominiums is the main water supply pipe or main hot water supply pipe connected to the header first, then branched into multiple parts at this header, and each watering facility is attached to the joint provided at the branch of the header This is a method of connecting one-to-one connection pipes with water faucets, connecting the main water supply pipes and main hot water supply pipes to the water faucets of each watering facility by branching them into branches through the joints. Compared to the pipes made by the pre-branch method, the number of connection points is small and water leakage due to poor construction can be remarkably suppressed. In addition, stable flow of water and hot water is possible with less change in flow rate when using the watering equipment at the same time. It is.
In addition, the connection pipe connected to each joint is mainly a synthetic resin pipe such as a cross-linked polyethylene pipe, and is used not only for hot water supply but also as a water supply pipe. For the purpose of preventing noises, etc., it is generally inserted into a sheath pipe laid on the soil such as under the floor.

By the way, since the joint connected to the header is thicker than the connection pipe connected to the joint, if you want to cover not only the connection pipe but also the joint part with only the sheath pipe, you must make the sheath pipe a large diameter. Don't be. However, if the diameter of the entire sheath tube is made large, there is a problem that the piping space becomes narrow.
Therefore, as shown in FIGS. 6 and 7, a tubular protective cover for a terminal having a covering portion 210 covering the outer periphery of the joint 100 at one end and an insertion portion 220 inserted into the sheath tube 300 at the other end. (Terminal connector) 200 is used to cover the joint portion (see Patent Document 1).

  That is, as shown in FIG. 7, the tubular protective cover 200 is configured such that the end portion of the connection tube 400 is covered with the covering portion 210 in a state where the insertion portion 220 is inserted into the end portion of the sheath tube 300 into which the connection tube 400 is inserted. The tubular protective cover 200 is attached until the end of the connecting pipe 400 is connected to the joint 100 with the tip exposed to the outside, and then the joint 100 is covered by the covering portion 210 with the sealing cap 310 removed. After sliding in the direction of the joint 100, the sealing cap 310 is externally fitted to the sheath pipe 300 to cover the portion of the connecting pipe 400 that protrudes from the sheath pipe 300, and the joint 100 portion can also be held in a covered state. Yes. In addition, since the joint 200 portion is reliably covered, the fluid leaking from the joint 200 portion can be reliably guided into the sheath tube 300, and the leaked fluid is discharged to the surroundings, so that the surrounding wall surface and the like are covered. There is no fouling.

However, as shown in FIGS. 7 and 8, the header 500 is often covered with a cylindrical heat insulating material 600 while leaving a portion of the joint 100. In such a case, as shown in FIGS. As described above, since the tubular protective cover 200 hits the wall surface of the heat insulating material 600, a part of the joint 100 remains exposed, and the appearance is poor.
In addition, when there is such an exposed portion, there is a problem in heat retention, and the impact sound generated by the water hammer and the sound of water flowing in the pipe are likely to leak out as noise from this gap portion. Furthermore, for example, in the case of a hot water supply pipe, there is a risk that the joint 100 may come into contact with a burn, and in the case of a water supply pipe, there is a problem that the joint 100 portion is likely to be condensed due to outside air.

  On the other hand, a heat insulating material has been proposed in which the header and branch joints provided so as to be arranged in a straight line at intervals in the pipe axis direction of the header can be kept warm (Patent Documents 2 and 3). reference).

This heat insulating material has a concave portion having an inner surface substantially the same as the outer shape of the header and the branch joint portion, and is provided on one side of the wall surface opposite to the joint concave portion along a straight line connecting the pipe axes of the joints arranged in a straight line. Divided into two with the parts connected.
Then, one of the divided parts is rotated around the connecting part, and the concave part is opened in a split state. After fitting the half of the header and the branch joint into the divided concave part of the one divided part, The other divided portion is rotated in the direction in which the concave portion closes around the connecting portion, and the remaining half of the header and the branch joint is fitted into the divided concave portion of the other divided portion.

Therefore, if this heat insulating material and the tubular protective cover 200 are used in combination, the above problem can be solved.
However, in the case of this heat insulating material, since the joints are lined up at the same pitch and only joints having the same shape can be used, the heat retaining material that is different for each joint pitch, joint diameter and shape is different. There is a problem that the material has to be prepared and costs are high.

Japanese Utility Model Publication No. 6-32553 JP 2005-180519 A JP 2007-321808 A

  In view of the above circumstances, an object of the present invention is to provide a tubular protective cover that can easily cover a joint portion without a gap even when the header is covered with a cylindrical heat insulating material.

  In order to achieve the above object, a tubular protective cover according to the present invention is a tubular protective cover for a connecting pipe having at least one end of a tubular joint cover part having an inner diameter including a joint to which the connecting pipe is connected. The joint cover part includes a cut slit or a thin part formed in a substantially bowl shape along the wall surface of the tip part.

The tubular protective cover of the present invention may have any other end, but for example, it preferably has a connection structure with a sheath tube covering the connection tube.
Further, at least a part of the portion other than the joint cover portion may be formed in a bellows structure that can be expanded and contracted in the tube axis direction.

  The material of the tubular protective cover of the present invention is not particularly limited, and examples thereof include thermoplastic resins such as polyethylene and polypropylene, and foams thereof may be used.

As described above, the tubular protective cover according to the present invention is a tubular protective cover for a connecting pipe having at least one end having a cylindrical joint cover portion including a joint to which the connecting pipe is connected. Since the cover portion has a cut slit or a thin wall portion formed in a substantially bowl shape along the wall surface of the front end portion, the front end portion of the joint cover portion is cut along the cut slit or the joint along the thin wall portion. By bending the front end portion of the cover portion inward, the end surface of the joint cover portion that is in contact with the heat insulating material has a substantially bowl shape.
Therefore, the part that is recessed in the tube axis direction from the tip of the joint cover part at the end face of the joint cover part or the bent part that has the substantially bowl-shaped end surface is exposed parallel to the pipe axis of the header. If the heat insulating material is received so as to coincide with the line segment along the central axis of the hole, the end face of the cut portion or the bent portion is received by the heat insulating material wall surface around the exposure hole over substantially the entire circumference.
In other words, the joint cover portion can cover the joint portion with almost no gap, so that the heat retaining property is improved, and the impact sound generated by the water hammer and the sound of water flowing in the pipe are hardly leaked as noise. In addition, for example, even in the case of a hot water supply pipe, the joint does not come into contact with the burn, and in the case of a water supply pipe, the joint portion is less likely to hit the outside air and is difficult to condense.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
FIG. 1 shows a first embodiment of a tubular protective cover according to the present invention.

As shown in FIG. 1, the tubular protective cover 1 a includes a joint cover portion 11 at one end and an insertion portion 12 to the sheath tube 2 at the other end. In FIG. 1, reference numeral 21 denotes a sealing cap. The joint cover portion 11 has a cylindrical shape with a size including a cap nut fixing type joint 3 provided on a header 5 to be described later, and has a bowl shape on the wall surface of the tip portion. A cut-out slit 11a formed in a broken line shape is provided.

  The insertion portion 12 can be inserted into the sheath tube 2 with the connection tube 4 inserted therein, and can be fixed at a desired insertion position by fitting the sealing cap 21 to the sheath tube 2. .

The tubular protective cover 1a is configured as described above. As shown in FIG. 2, when the header 5 is covered with a cylindrical heat insulating material 6 except for the exposure hole 61 portion of the joint 3, The end of the cut-out part 13 having a bowl-like end face shape is cut along the cut-off slit 11a, and the end of the cut-out part 13 that is most recessed in the pipe axis direction is exposed parallel to the pipe axis of the header 5. If the heat insulating material 6 is received so as to coincide with the line segment along the central axis of the hole 61, the end surface of the cut-out portion 13 is the wall surface of the heat insulating material around the exposure hole 61 as shown in FIGS. Can be received over almost the entire circumference.
Therefore, the joint 3 is almost completely covered with the joint cover portion 11, and the impact sound generated by the water hammer and the sound of water flowing in the pipe are hardly leaked as noise. Further, for example, even in the case of a hot water supply pipe, the joint 3 is not contacted and burned, and in the case of a water supply pipe as well, the joint 3 portion hardly hits the outside air and is difficult to condense.

FIG. 5 shows a second embodiment of the tubular protective cover according to the present invention.
As shown in FIG. 5, this tubular protective cover 1b has a joint cover portion 14 at one end and a fitting portion 15 with the sheath tube 2 at the other end, and an intermediate portion 16 in the tube axis direction. Stretchable bellows structure.

The joint cover part 14 is provided with a thin part 14a formed in a bowl shape on the wall surface of the tip part.
The fitting portion 15 is externally fitted to the end portion of the sheath tube 2 and is elastically locked to the sheath tube 2.

As described above, the tubular protective cover 1b includes the thin wall portion 14a in which the joint cover portion 14 is formed in a bowl shape on the wall surface of the distal end portion. Therefore, the wall surface of the distal end portion of the joint cover portion 14 along the thin wall portion 14a. Can be easily folded inward. And by this bending, the joint cover part 14 will be in the same state that the front end surface was cut off along the cut slit 11a, and the joint 3 was almost completely covered by the joint cover part 11 like the tubular protective cover 1a. Can be. In addition, since the bent portion exists on the inner side, the bent portion can be pressed against the side wall surface of the joint 3, and the joint cover portion 14 can be firmly fixed in a state of covering the joint 3.
Further, since the intermediate portion 16 has a bellows structure that can be expanded and contracted in the direction of the tube axis, it is not necessary to attach and detach the sealing cap 21 as in the case of the tubular protective cover 1a. Is easy to adjust.

The present invention is not limited to the above embodiment. For example, in the above embodiment, a cap nut screw-type joint is used as the joint. You may make it use what is called a one-touch coupling (for example, the brand name Srocatit by Sekisui Chemical Co., Ltd.) which becomes a state which diameter-reduced and the connection pipe was prevented from coming off.
In the above embodiment, the cutting slit portion is used for cutting, but it may be bent inward along the cutting slit portion.

Further, in the above-described embodiment, it was cut along the cut slit or bent along the thin wall portion. When doing so, it is not necessary to cut along the cut slit or bend along the thin portion.
Furthermore, in the above-described embodiment, it is provided so as to cover the connection portion between the header-side joint and the connection pipe, but this is also applied to the water faucet of each watering facility and the connection portion on the hot-water tap side. The tubular protective cover of the invention can be used.

In the above-described embodiment, the joint cover portion is provided at one end, but may be provided at both ends.
Moreover, the joint cover part may incorporate the heat insulating material. Thus, if it is set as the structure which incorporated the heat insulating material, heat insulating property and sound-insulating property will improve further.

It is 1st Embodiment of the tubular protective cover concerning this invention, Comprising: It is the side view. It is a partially cutaway sectional view showing a state immediately before the joint portion is covered with the joint cover portion of the tubular protective cover of FIG. It is a figure which shows the state which covered the joint part with the joint cover part of the tubular protective cover of FIG. It is the XX sectional view taken on the line of FIG. It is 2nd Embodiment of the tubular protective cover concerning this invention, Comprising: It is the side view. It is a perspective view of the conventional tubular protective cover. It is a partially cutaway sectional view showing a state immediately before the joint portion is covered with the joint cover portion of the tubular protective cover of FIG. It is a figure which shows the state which covered the joint part with the joint cover part of the tubular protective cover of FIG. It is the YY sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b Tubular protective cover 11, 14 Joint cover part 11a Cut slit 14a Thin part 16 Middle part (bellows structure part)
2 Sheath tube 3 Joint 4 Connection tube

Claims (3)

  A tubular protective cover for a connecting pipe having at least one end a cylindrical joint cover part including a joint to which the connecting pipe is connected, wherein the joint cover part has a generally bowl shape along the wall surface of the tip part A tubular protective cover comprising a cut-off slit or a thin-walled portion formed on the tube.   The tubular protective cover according to claim 1, wherein the other end has a connection structure with a sheath pipe covering the connection pipe.   The tubular protective cover according to claim 1 or 2, wherein at least a part of a portion other than the joint cover portion is formed in a bellows structure that can be expanded and contracted in a tube axis direction.

Images